VisionFive2 Linux kernel

b24413180f560 (Greg Kroah-Hartman 2017-11-01 15:07:57 +0100   1) // SPDX-License-Identifier: GPL-2.0
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   2) /*
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   3)  * Super block/filesystem wide operations
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   4)  *
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   5)  * Copyright (C) 1996 Peter J. Braam <braam@maths.ox.ac.uk> and 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   6)  * Michael Callahan <callahan@maths.ox.ac.uk> 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   7)  * 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   8)  * Rewritten for Linux 2.1.  Peter Braam <braam@cs.cmu.edu>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700   9)  * Copyright (C) Carnegie Mellon University
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  10)  */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  11) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  12) #include <linux/module.h>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  13) #include <linux/kernel.h>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  14) #include <linux/mm.h>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  15) #include <linux/string.h>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  16) #include <linux/stat.h>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  17) #include <linux/errno.h>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  18) #include <linux/unistd.h>
da47c19e5c746 (Yoshihisa Abe      2010-10-25 02:03:46 -0400  19) #include <linux/mutex.h>
b5ce1d83a62fc (Yoshihisa Abe      2010-10-25 02:03:44 -0400  20) #include <linux/spinlock.h>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  21) #include <linux/file.h>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  22) #include <linux/vfs.h>
5a0e3ad6af866 (Tejun Heo          2010-03-24 17:04:11 +0900  23) #include <linux/slab.h>
9fd973e085f77 (Eric W. Biederman  2013-01-30 18:50:54 -0800  24) #include <linux/pid_namespace.h>
834b46c37a290 (Fabian Frederick   2014-08-08 14:20:33 -0700  25) #include <linux/uaccess.h>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  26) #include <linux/fs.h>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  27) #include <linux/vmalloc.h>
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  28) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  29) #include <linux/coda.h>
8fc8b9df83138 (David Howells      2019-07-16 16:28:47 -0700  30) #include "coda_psdev.h"
31a203df9c109 (Al Viro            2011-01-12 16:36:09 -0500  31) #include "coda_linux.h"
31a203df9c109 (Al Viro            2011-01-12 16:36:09 -0500  32) #include "coda_cache.h"
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  33) 
c98d8cfbc600a (Adrian Bunk        2006-03-24 03:15:53 -0800  34) #include "coda_int.h"
c98d8cfbc600a (Adrian Bunk        2006-03-24 03:15:53 -0800  35) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  36) /* VFS super_block ops */
b57922d97fd6f (Al Viro            2010-06-07 14:34:48 -0400  37) static void coda_evict_inode(struct inode *);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  38) static void coda_put_super(struct super_block *);
726c334223180 (David Howells      2006-06-23 02:02:58 -0700  39) static int coda_statfs(struct dentry *dentry, struct kstatfs *buf);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  40) 
e18b890bb0881 (Christoph Lameter  2006-12-06 20:33:20 -0800  41) static struct kmem_cache * coda_inode_cachep;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  42) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  43) static struct inode *coda_alloc_inode(struct super_block *sb)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  44) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  45) 	struct coda_inode_info *ei;
747fecab32e47 (Jesper Juhl        2010-12-09 23:25:09 +0100  46) 	ei = kmem_cache_alloc(coda_inode_cachep, GFP_KERNEL);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  47) 	if (!ei)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  48) 		return NULL;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  49) 	memset(&ei->c_fid, 0, sizeof(struct CodaFid));
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  50) 	ei->c_flags = 0;
17499e332962e (Eric W. Biederman  2013-01-30 19:36:06 -0800  51) 	ei->c_uid = GLOBAL_ROOT_UID;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  52) 	ei->c_cached_perm = 0;
b5ce1d83a62fc (Yoshihisa Abe      2010-10-25 02:03:44 -0400  53) 	spin_lock_init(&ei->c_lock);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  54) 	return &ei->vfs_inode;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  55) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  56) 
d984892bd7e8f (Al Viro            2019-04-15 22:28:35 -0400  57) static void coda_free_inode(struct inode *inode)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  58) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  59) 	kmem_cache_free(coda_inode_cachep, ITOC(inode));
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  60) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  61) 
51cc50685a427 (Alexey Dobriyan    2008-07-25 19:45:34 -0700  62) static void init_once(void *foo)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  63) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  64) 	struct coda_inode_info *ei = (struct coda_inode_info *) foo;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  65) 
a35afb830f8d7 (Christoph Lameter  2007-05-16 22:10:57 -0700  66) 	inode_init_once(&ei->vfs_inode);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  67) }
20c2df83d25c6 (Paul Mundt         2007-07-20 10:11:58 +0900  68) 
5f356fd4d75fd (Fabian Frederick   2014-04-03 14:50:24 -0700  69) int __init coda_init_inodecache(void)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  70) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  71) 	coda_inode_cachep = kmem_cache_create("coda_inode_cache",
5d097056c9a01 (Vladimir Davydov   2016-01-14 15:18:21 -0800  72) 				sizeof(struct coda_inode_info), 0,
5d097056c9a01 (Vladimir Davydov   2016-01-14 15:18:21 -0800  73) 				SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
5d097056c9a01 (Vladimir Davydov   2016-01-14 15:18:21 -0800  74) 				SLAB_ACCOUNT, init_once);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  75) 	if (coda_inode_cachep == NULL)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  76) 		return -ENOMEM;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  77) 	return 0;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  78) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  79) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  80) void coda_destroy_inodecache(void)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  81) {
8c0a85377048b (Kirill A. Shutemov 2012-09-26 11:33:07 +1000  82) 	/*
8c0a85377048b (Kirill A. Shutemov 2012-09-26 11:33:07 +1000  83) 	 * Make sure all delayed rcu free inodes are flushed before we
8c0a85377048b (Kirill A. Shutemov 2012-09-26 11:33:07 +1000  84) 	 * destroy cache.
8c0a85377048b (Kirill A. Shutemov 2012-09-26 11:33:07 +1000  85) 	 */
8c0a85377048b (Kirill A. Shutemov 2012-09-26 11:33:07 +1000  86) 	rcu_barrier();
1a1d92c10dd24 (Alexey Dobriyan    2006-09-27 01:49:40 -0700  87) 	kmem_cache_destroy(coda_inode_cachep);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  88) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  89) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  90) static int coda_remount(struct super_block *sb, int *flags, char *data)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  91) {
02b9984d64087 (Theodore Ts'o      2014-03-13 10:14:33 -0400  92) 	sync_filesystem(sb);
1751e8a6cb935 (Linus Torvalds     2017-11-27 13:05:09 -0800  93) 	*flags |= SB_NOATIME;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  94) 	return 0;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  95) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  96) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  97) /* exported operations */
ee9b6d61a2a43 (Josef 'Jeff' Sipek 2007-02-12 00:55:41 -0800  98) static const struct super_operations coda_super_operations =
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700  99) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 100) 	.alloc_inode	= coda_alloc_inode,
d984892bd7e8f (Al Viro            2019-04-15 22:28:35 -0400 101) 	.free_inode	= coda_free_inode,
b57922d97fd6f (Al Viro            2010-06-07 14:34:48 -0400 102) 	.evict_inode	= coda_evict_inode,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 103) 	.put_super	= coda_put_super,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 104) 	.statfs		= coda_statfs,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 105) 	.remount_fs	= coda_remount,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 106) };
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 107) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 108) static int get_device_index(struct coda_mount_data *data)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 109) {
2903ff019b346 (Al Viro            2012-08-28 12:52:22 -0400 110) 	struct fd f;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 111) 	struct inode *inode;
2903ff019b346 (Al Viro            2012-08-28 12:52:22 -0400 112) 	int idx;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 113) 
78f7d75e5dd9a (Al Viro            2012-08-27 12:54:13 -0400 114) 	if (data == NULL) {
6d6bd94f4d83d (Fabian Frederick   2014-06-06 14:36:20 -0700 115) 		pr_warn("%s: Bad mount data\n", __func__);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 116) 		return -1;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 117) 	}
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 118) 
78f7d75e5dd9a (Al Viro            2012-08-27 12:54:13 -0400 119) 	if (data->version != CODA_MOUNT_VERSION) {
6d6bd94f4d83d (Fabian Frederick   2014-06-06 14:36:20 -0700 120) 		pr_warn("%s: Bad mount version\n", __func__);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 121) 		return -1;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 122) 	}
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 123) 
2903ff019b346 (Al Viro            2012-08-28 12:52:22 -0400 124) 	f = fdget(data->fd);
2903ff019b346 (Al Viro            2012-08-28 12:52:22 -0400 125) 	if (!f.file)
78f7d75e5dd9a (Al Viro            2012-08-27 12:54:13 -0400 126) 		goto Ebadf;
496ad9aa8ef44 (Al Viro            2013-01-23 17:07:38 -0500 127) 	inode = file_inode(f.file);
78f7d75e5dd9a (Al Viro            2012-08-27 12:54:13 -0400 128) 	if (!S_ISCHR(inode->i_mode) || imajor(inode) != CODA_PSDEV_MAJOR) {
2903ff019b346 (Al Viro            2012-08-28 12:52:22 -0400 129) 		fdput(f);
78f7d75e5dd9a (Al Viro            2012-08-27 12:54:13 -0400 130) 		goto Ebadf;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 131) 	}
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 132) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 133) 	idx = iminor(inode);
2903ff019b346 (Al Viro            2012-08-28 12:52:22 -0400 134) 	fdput(f);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 135) 
78f7d75e5dd9a (Al Viro            2012-08-27 12:54:13 -0400 136) 	if (idx < 0 || idx >= MAX_CODADEVS) {
6d6bd94f4d83d (Fabian Frederick   2014-06-06 14:36:20 -0700 137) 		pr_warn("%s: Bad minor number\n", __func__);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 138) 		return -1;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 139) 	}
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 140) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 141) 	return idx;
78f7d75e5dd9a (Al Viro            2012-08-27 12:54:13 -0400 142) Ebadf:
6d6bd94f4d83d (Fabian Frederick   2014-06-06 14:36:20 -0700 143) 	pr_warn("%s: Bad file\n", __func__);
78f7d75e5dd9a (Al Viro            2012-08-27 12:54:13 -0400 144) 	return -1;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 145) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 146) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 147) static int coda_fill_super(struct super_block *sb, void *data, int silent)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 148) {
a1b0aa8764749 (Jan Harkes         2007-07-19 01:48:50 -0700 149) 	struct inode *root = NULL;
da47c19e5c746 (Yoshihisa Abe      2010-10-25 02:03:46 -0400 150) 	struct venus_comm *vc;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 151) 	struct CodaFid fid;
a1b0aa8764749 (Jan Harkes         2007-07-19 01:48:50 -0700 152) 	int error;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 153) 	int idx;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 154) 
9fd973e085f77 (Eric W. Biederman  2013-01-30 18:50:54 -0800 155) 	if (task_active_pid_ns(current) != &init_pid_ns)
9fd973e085f77 (Eric W. Biederman  2013-01-30 18:50:54 -0800 156) 		return -EINVAL;
9fd973e085f77 (Eric W. Biederman  2013-01-30 18:50:54 -0800 157) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 158) 	idx = get_device_index((struct coda_mount_data *) data);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 159) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 160) 	/* Ignore errors in data, for backward compatibility */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 161) 	if(idx == -1)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 162) 		idx = 0;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 163) 	
6d6bd94f4d83d (Fabian Frederick   2014-06-06 14:36:20 -0700 164) 	pr_info("%s: device index: %i\n", __func__,  idx);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 165) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 166) 	vc = &coda_comms[idx];
da47c19e5c746 (Yoshihisa Abe      2010-10-25 02:03:46 -0400 167) 	mutex_lock(&vc->vc_mutex);
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 168) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 169) 	if (!vc->vc_inuse) {
6d6bd94f4d83d (Fabian Frederick   2014-06-06 14:36:20 -0700 170) 		pr_warn("%s: No pseudo device\n", __func__);
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 171) 		error = -EINVAL;
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 172) 		goto unlock_out;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 173) 	}
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 174) 
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 175) 	if (vc->vc_sb) {
6d6bd94f4d83d (Fabian Frederick   2014-06-06 14:36:20 -0700 176) 		pr_warn("%s: Device already mounted\n", __func__);
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 177) 		error = -EBUSY;
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 178) 		goto unlock_out;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 179) 	}
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 180) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 181) 	vc->vc_sb = sb;
da47c19e5c746 (Yoshihisa Abe      2010-10-25 02:03:46 -0400 182) 	mutex_unlock(&vc->vc_mutex);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 183) 
a1b0aa8764749 (Jan Harkes         2007-07-19 01:48:50 -0700 184) 	sb->s_fs_info = vc;
1751e8a6cb935 (Linus Torvalds     2017-11-27 13:05:09 -0800 185) 	sb->s_flags |= SB_NOATIME;
fac1f0e34026a (Jan Harkes         2007-07-19 01:48:44 -0700 186) 	sb->s_blocksize = 4096;	/* XXXXX  what do we put here?? */
fac1f0e34026a (Jan Harkes         2007-07-19 01:48:44 -0700 187) 	sb->s_blocksize_bits = 12;
fac1f0e34026a (Jan Harkes         2007-07-19 01:48:44 -0700 188) 	sb->s_magic = CODA_SUPER_MAGIC;
fac1f0e34026a (Jan Harkes         2007-07-19 01:48:44 -0700 189) 	sb->s_op = &coda_super_operations;
9501e4c48e156 (Al Viro            2011-01-12 16:25:02 -0500 190) 	sb->s_d_op = &coda_dentry_operations;
22b139691f9eb (Deepa Dinamani     2019-07-30 08:22:29 -0700 191) 	sb->s_time_gran = 1;
22b139691f9eb (Deepa Dinamani     2019-07-30 08:22:29 -0700 192) 	sb->s_time_min = S64_MIN;
22b139691f9eb (Deepa Dinamani     2019-07-30 08:22:29 -0700 193) 	sb->s_time_max = S64_MAX;
a5695a7908865 (Jan Kara           2017-04-12 12:24:38 +0200 194) 
a5695a7908865 (Jan Kara           2017-04-12 12:24:38 +0200 195) 	error = super_setup_bdi(sb);
a5695a7908865 (Jan Kara           2017-04-12 12:24:38 +0200 196) 	if (error)
a5695a7908865 (Jan Kara           2017-04-12 12:24:38 +0200 197) 		goto error;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 198) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 199) 	/* get root fid from Venus: this needs the root inode */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 200) 	error = venus_rootfid(sb, &fid);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 201) 	if ( error ) {
6d6bd94f4d83d (Fabian Frederick   2014-06-06 14:36:20 -0700 202) 		pr_warn("%s: coda_get_rootfid failed with %d\n",
6d6bd94f4d83d (Fabian Frederick   2014-06-06 14:36:20 -0700 203) 			__func__, error);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 204) 		goto error;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 205) 	}
6d6bd94f4d83d (Fabian Frederick   2014-06-06 14:36:20 -0700 206) 	pr_info("%s: rootfid is %s\n", __func__, coda_f2s(&fid));
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 207) 	
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 208) 	/* make root inode */
f4947fbce2089 (Al Viro            2012-01-10 11:11:49 -0500 209)         root = coda_cnode_make(&fid, sb);
f4947fbce2089 (Al Viro            2012-01-10 11:11:49 -0500 210)         if (IS_ERR(root)) {
f4947fbce2089 (Al Viro            2012-01-10 11:11:49 -0500 211) 		error = PTR_ERR(root);
d9b4b3195a06e (Fabian Frederick   2014-06-06 14:36:18 -0700 212) 		pr_warn("Failure of coda_cnode_make for root: error %d\n",
d9b4b3195a06e (Fabian Frederick   2014-06-06 14:36:18 -0700 213) 			error);
f4947fbce2089 (Al Viro            2012-01-10 11:11:49 -0500 214) 		goto error;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 215) 	} 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 216) 
6d6bd94f4d83d (Fabian Frederick   2014-06-06 14:36:20 -0700 217) 	pr_info("%s: rootinode is %ld dev %s\n",
6d6bd94f4d83d (Fabian Frederick   2014-06-06 14:36:20 -0700 218) 		__func__, root->i_ino, root->i_sb->s_id);
48fde701aff66 (Al Viro            2012-01-08 22:15:13 -0500 219) 	sb->s_root = d_make_root(root);
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 220) 	if (!sb->s_root) {
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 221) 		error = -EINVAL;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 222) 		goto error;
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 223) 	}
db71922217a21 (Jan Blunck         2010-08-15 22:51:10 +0200 224) 	return 0;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 225) 
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 226) error:
da47c19e5c746 (Yoshihisa Abe      2010-10-25 02:03:46 -0400 227) 	mutex_lock(&vc->vc_mutex);
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 228) 	vc->vc_sb = NULL;
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 229) 	sb->s_fs_info = NULL;
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 230) unlock_out:
da47c19e5c746 (Yoshihisa Abe      2010-10-25 02:03:46 -0400 231) 	mutex_unlock(&vc->vc_mutex);
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 232) 	return error;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 233) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 234) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 235) static void coda_put_super(struct super_block *sb)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 236) {
da47c19e5c746 (Yoshihisa Abe      2010-10-25 02:03:46 -0400 237) 	struct venus_comm *vcp = coda_vcp(sb);
da47c19e5c746 (Yoshihisa Abe      2010-10-25 02:03:46 -0400 238) 	mutex_lock(&vcp->vc_mutex);
da47c19e5c746 (Yoshihisa Abe      2010-10-25 02:03:46 -0400 239) 	vcp->vc_sb = NULL;
a1b0aa8764749 (Jan Harkes         2007-07-19 01:48:50 -0700 240) 	sb->s_fs_info = NULL;
da47c19e5c746 (Yoshihisa Abe      2010-10-25 02:03:46 -0400 241) 	mutex_unlock(&vcp->vc_mutex);
79a0d65e77ed5 (Fabian Frederick   2019-07-16 16:28:54 -0700 242) 	mutex_destroy(&vcp->vc_mutex);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 243) 
f38cfb2564f5f (Fabian Frederick   2014-06-06 14:36:19 -0700 244) 	pr_info("Bye bye.\n");
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 245) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 246) 
b57922d97fd6f (Al Viro            2010-06-07 14:34:48 -0400 247) static void coda_evict_inode(struct inode *inode)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 248) {
91b0abe36a7b2 (Johannes Weiner    2014-04-03 14:47:49 -0700 249) 	truncate_inode_pages_final(&inode->i_data);
dbd5768f87ff6 (Jan Kara           2012-05-03 14:48:02 +0200 250) 	clear_inode(inode);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 251) 	coda_cache_clear_inode(inode);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 252) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 253) 
549c7297717c3 (Christian Brauner  2021-01-21 14:19:43 +0100 254) int coda_getattr(struct user_namespace *mnt_userns, const struct path *path,
549c7297717c3 (Christian Brauner  2021-01-21 14:19:43 +0100 255) 		 struct kstat *stat, u32 request_mask, unsigned int flags)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 256) {
a528d35e8bfcc (David Howells      2017-01-31 16:46:22 +0000 257) 	int err = coda_revalidate_inode(d_inode(path->dentry));
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 258) 	if (!err)
0d56a4518d5ea (Christian Brauner  2021-01-21 14:19:30 +0100 259) 		generic_fillattr(&init_user_ns, d_inode(path->dentry), stat);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 260) 	return err;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 261) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 262) 
549c7297717c3 (Christian Brauner  2021-01-21 14:19:43 +0100 263) int coda_setattr(struct user_namespace *mnt_userns, struct dentry *de,
549c7297717c3 (Christian Brauner  2021-01-21 14:19:43 +0100 264) 		 struct iattr *iattr)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 265) {
2b0143b5c986b (David Howells      2015-03-17 22:25:59 +0000 266) 	struct inode *inode = d_inode(de);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 267) 	struct coda_vattr vattr;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 268) 	int error;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 269) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 270) 	memset(&vattr, 0, sizeof(vattr)); 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 271) 
02027d42c3f74 (Deepa Dinamani     2016-09-14 07:48:05 -0700 272) 	inode->i_ctime = current_time(inode);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 273) 	coda_iattr_to_vattr(iattr, &vattr);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 274) 	vattr.va_type = C_VNON; /* cannot set type */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 275) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 276) 	/* Venus is responsible for truncating the container-file!!! */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 277) 	error = venus_setattr(inode->i_sb, coda_i2f(inode), &vattr);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 278) 
f7cc02b871561 (Yoshihisa Abe      2010-10-25 02:03:45 -0400 279) 	if (!error) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 280) 	        coda_vattr_to_iattr(inode, &vattr); 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 281) 		coda_cache_clear_inode(inode);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 282) 	}
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 283) 	return error;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 284) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 285) 
754661f143e70 (Arjan van de Ven   2007-02-12 00:55:38 -0800 286) const struct inode_operations coda_file_inode_operations = {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 287) 	.permission	= coda_permission,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 288) 	.getattr	= coda_getattr,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 289) 	.setattr	= coda_setattr,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 290) };
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 291) 
726c334223180 (David Howells      2006-06-23 02:02:58 -0700 292) static int coda_statfs(struct dentry *dentry, struct kstatfs *buf)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 293) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 294) 	int error;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 295) 	
726c334223180 (David Howells      2006-06-23 02:02:58 -0700 296) 	error = venus_statfs(dentry, buf);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 297) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 298) 	if (error) {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 299) 		/* fake something like AFS does */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 300) 		buf->f_blocks = 9000000;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 301) 		buf->f_bfree  = 9000000;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 302) 		buf->f_bavail = 9000000;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 303) 		buf->f_files  = 9000000;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 304) 		buf->f_ffree  = 9000000;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 305) 	}
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 306) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 307) 	/* and fill in the rest */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 308) 	buf->f_type = CODA_SUPER_MAGIC;
fac1f0e34026a (Jan Harkes         2007-07-19 01:48:44 -0700 309) 	buf->f_bsize = 4096;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 310) 	buf->f_namelen = CODA_MAXNAMLEN;
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 311) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 312) 	return 0; 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 313) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 314) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 315) /* init_coda: used by filesystems.c to register coda */
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 316) 
3c26ff6e499ee (Al Viro            2010-07-25 11:46:36 +0400 317) static struct dentry *coda_mount(struct file_system_type *fs_type,
3c26ff6e499ee (Al Viro            2010-07-25 11:46:36 +0400 318) 	int flags, const char *dev_name, void *data)
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 319) {
3c26ff6e499ee (Al Viro            2010-07-25 11:46:36 +0400 320) 	return mount_nodev(fs_type, flags, data, coda_fill_super);
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 321) }
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 322) 
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 323) struct file_system_type coda_fs_type = {
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 324) 	.owner		= THIS_MODULE,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 325) 	.name		= "coda",
3c26ff6e499ee (Al Viro            2010-07-25 11:46:36 +0400 326) 	.mount		= coda_mount,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 327) 	.kill_sb	= kill_anon_super,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 328) 	.fs_flags	= FS_BINARY_MOUNTDATA,
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 329) };
7f78e03513940 (Eric W. Biederman  2013-03-02 19:39:14 -0800 330) MODULE_ALIAS_FS("coda");
^1da177e4c3f4 (Linus Torvalds     2005-04-16 15:20:36 -0700 331)